Need help w/Master Lock 647D

[newbie_lock]

This is a copy of a post I did in the Hardware section. Sorry, I am a newbie to all of this. Pls forgive.

I am new to all of this, and I need some assistance, please. Previously, I successfully used a shim on a single-dial Master Lock. However, I now have a Master Lock 647D (multiple-dial).

I tried using a regular shim, but it didn't work. Should I just use a smaller size & try it?

I would greatly appreciate any instruction(s) on how to get this lock open. Thank you!

[unlisted]

Why are you shimming the lock?

Have any photos of it?

Oh, and cross posting in other subforums is not allowed. One of the threads will be deleted.

[newbie_lock]

Oops! Sorry! I will do better next time. Please forgive this newbie.

I will try to post pics tomorrow.

Again, I'm sorry!

[unlisted]

Why do you need to shim the lock?

[newbie_lock]

Here is the pic of 647D you requested:



I have recently taken up the hobby of lockpicking. My next post was to ask for suggestions of tools & books.

My husband was impressed about me figuring out how to shim just a regular Master combo lock, that he went out & bought the 647D to see if I can get it open.

Again, I am sorry about the double posting. I just printed off the FAQs & "instructions" for me to reread. I will learn.

[raimundo]

There are numerous ways that are used on this sort of lock,

I recommend that you tie a cord from a stationary object to the shackle, then put a couple of fingers through the shackle to pull on the lock body. This is how you should hold it. with tension put into the lock by pulling on the shackle, and feel the inteface between the shackle and the lock body by putting a finger against the shackle so that it is touching both the shackle and the lock body. You may find the this will give a type of feed back when the shackle moves a little bit. Touch is far more sensitive than sight in this kind of thing.

With the hand that is not pulling on the lockbody, move the dials, Is one of them tighter than the other two, move it and feel for that shift between the lock body and the shackle, if you feel it, and you can only know that by experience, but no worries, this lock is doable.
Leave the dial where you felt the tiny jump in the shackle/lockbody interface and work another wheel, if you get this one,

REMEMBER if two of the wheels are correctly set, you only have to try each position on the last dial until it opens.

Other techniques include brushing the dials away from the shackle when there is no tension on them and then watching closely when you pull the shackle to see which one of the dials moves in the direction of your pull the most. you could use a paper and pencil to mark this as not the right spot. move that dial one place and repeat the brush and pull and looking for movement. keep doing this to that dial until it doesn't show any movement, leave it at the place that it shows no movement and move to another dial, search this one out similiarily, when you see no movement, leave it and dial down the last one, there are only 10 numbers to try.

The reason the second method works by sight rather than feel is because on some of these locks, the number dial you see is a second ring around the one that is locking the shackle root, and this cannot transmit feel but will move the outer ring visibly.

shimming this lock will not work, because it dosent have locking dogs, it simply has three bumps on the shackle root that all have to be aligned so that the openings that allow the bumps to pass throught the wheels are aligned on all three at once.

There are tools that fit in slim cracks alongside the dial and can open/decode them, but feeling for the opening and placing it correctly after finding it can be difficult in some of the new ones,

These are the basics, but don't follow them like they are absolute, keep your mind open to what the lock tells you, especially as in the first method mentioned, be open to learning what the lock is trying to tell you

If your fingers get tired and stressed, quit for a while, there is nothing to be gained by fingers that are stressed

[ToolyMcgee]

Ahh, so a challenge? I take it he didn't give you the combo. Raimundo's good post hit all bases, but there is always the manual method of decoding one of these wheel combo locks. 000, 001, 002, 003, only 996 more to go... Each time you turn a dial, press down on the top of the shackle, then pull the shackle. It will probably be helpful to tie it to something solid (as previously suggested) because you are going to be doing it enough times for it to be helpful. I hope it doesn't come to that, because it's rather time consuming, and not very thrilling.

I have been able to pick a combo dial in the past trying different tensions on the shackle, but I remember it had a small learning curve. Raimundo has already elborated past what I can add at this point. It can be done.

If you havn't found this already it is worth a look. A potential way to find the combo for a Master Dial lock.
http://www.wikihow.com/Crack-a-%22Master-Lock%22-Combination-Lock
Any time the security features built into the lock can be used to pick it open I am overly amused.

-Tooly

[newbie_lock]

Thank you, Raimundo & Tooly!

I will let y'all know how it goes. Btw, I did do the "000, 001, 002 ..." I got the combo that way, but I would like to be able to get it in a shorter period of time. That tactic took FOREVER!

Thank you, again!